<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>margin纵向重叠的问题</title>
  <style>
    p {
      font-size: 16px;
      line-height: 1;
      margin-top: 10px;
      margin-bottom: 15px;
    }
  </style>
</head>

<body>
  <p>AAA</p>
  <p></p>
  <p></p>
  <p></p>
  <p>BBB</p>

  <!-- 问题：AAA和BBB之间的距离是多少 -->
  <!-- 答案：15px -->
</body>

</html>